/* 组件工作台布局 */
:root {
  --wb-sidebar: 240px;
}

body {
  background: var(--igem-surface, #f4f7fb);
}

.igem-workbench {
  display: grid;
  grid-template-columns: var(--wb-sidebar) 1fr;
  align-items: start;
  min-height: calc(100vh - 180px);
  gap: 0;
}

/* ── 侧边栏 ── */
.igem-workbench__sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  max-height: 100vh;
  overflow-y: auto;
  padding: 1.5rem 0.85rem;
  background: #fff;
  border-right: 1px solid var(--igem-border, #e2e8f0);
}

.igem-workbench__sidebar::-webkit-scrollbar { width: 6px; }
.igem-workbench__sidebar::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }

.igem-workbench__sidebar-title {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--igem-muted, #64748b);
  margin: 1.1rem 0.65rem 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.igem-workbench__sidebar-title::before {
  content: "";
  flex: 0 0 14px;
  height: 2px;
  background: var(--igem-primary, #1e3a5f);
  border-radius: 2px;
  opacity: 0.6;
}

.igem-workbench__sidebar-title:first-of-type { margin-top: 0; }

.igem-workbench__nav a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.7rem;
  font-size: 0.83rem;
  color: var(--igem-text, #0f172a);
  text-decoration: none;
  border-radius: 0.45rem;
  border-left: 3px solid transparent;
  margin-bottom: 0.1rem;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.igem-workbench__nav a::before {
  content: "·";
  color: var(--igem-muted);
  font-size: 1rem;
  line-height: 0;
  margin-top: 0.4rem;
}

.igem-workbench__nav a:hover {
  background: var(--igem-surface, #f4f7fb);
  color: var(--igem-primary);
}

.igem-workbench__nav a.is-active {
  background: color-mix(in srgb, var(--igem-primary, #1e3a5f) 10%, transparent);
  border-left-color: var(--igem-primary, #1e3a5f);
  color: var(--igem-primary);
  font-weight: 600;
}
.igem-workbench__nav a.is-active::before { color: var(--igem-primary); }

/* ── 主区域 ── */
.igem-workbench__main {
  padding: 2rem 2.25rem 4rem;
  max-width: 960px;
}

.igem-workbench__section {
  scroll-margin-top: 1rem;
  margin-bottom: 3.5rem;
}

.igem-workbench__section-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--igem-primary, #1e3a5f);
}

.igem-workbench__section-num {
  font-family: "JetBrains Mono", ui-monospace, Menlo, monospace;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--igem-primary);
  background: color-mix(in srgb, var(--igem-primary, #1e3a5f) 10%, transparent);
  padding: 0.18rem 0.55rem;
  border-radius: 0.35rem;
  letter-spacing: 0.05em;
}

.igem-workbench__section-head h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--igem-text);
  margin: 0;
}

.igem-workbench__section-head p {
  font-size: 0.82rem;
  color: var(--igem-muted);
  margin: 0 0 0 auto;
}

.igem-workbench__variant {
  position: relative;
  margin-bottom: 1.75rem;
  background: #fff;
  border: 1px solid var(--igem-border);
  border-radius: 0.85rem;
  overflow: hidden;
}

.igem-workbench__variant-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.15rem;
  border-bottom: 1px solid var(--igem-border);
  background: color-mix(in srgb, var(--igem-primary, #1e3a5f) 4%, #fff);
}

.igem-workbench__variant-head h3 {
  font-size: 0.96rem;
  font-weight: 600;
  margin: 0;
  color: var(--igem-text);
  flex: 1;
}

.badge-variant {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--igem-primary, #1e3a5f);
  color: #fff;
  border-radius: 0.3rem;
  letter-spacing: 0;
}

.igem-workbench__variant-tag {
  font-size: 0.7rem;
  color: var(--igem-muted);
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--igem-border);
  border-radius: 999px;
}

.igem-workbench__variant-body {
  padding: 1.25rem;
}

.igem-workbench__variant-body > p:first-child {
  font-size: 0.82rem;
  color: var(--igem-muted);
  margin-top: 0;
  margin-bottom: 1rem;
}

/* 代码片段 */
.igem-workbench__code {
  margin: 0;
  border-top: 1px solid var(--igem-border);
  background: #0f172a;
}

.igem-workbench__code summary {
  list-style: none;
  cursor: pointer;
  padding: 0.55rem 1.15rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: #94a3b8;
  background: #1e293b;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.igem-workbench__code summary::-webkit-details-marker { display: none; }
.igem-workbench__code summary::before {
  content: "▶";
  font-size: 0.65rem;
  transition: transform 0.2s;
}
.igem-workbench__code[open] summary::before { transform: rotate(90deg); }
.igem-workbench__code summary:hover { color: #cbd5e1; }

.igem-workbench__code pre {
  margin: 0;
  padding: 0.85rem 1.15rem;
  font-size: 0.72rem;
  line-height: 1.55;
  color: #e2e8f0;
  background: #0f172a;
  overflow-x: auto;
  font-family: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
}

/* 工作台导言 */
.igem-workbench__intro {
  margin: 0 0 2rem;
  padding: 1rem 1.25rem;
  background: color-mix(in srgb, var(--igem-accent, #3d7ea6) 8%, #fff);
  border-left: 4px solid var(--igem-accent, #3d7ea6);
  border-radius: 0 0.5rem 0.5rem 0;
  font-size: 0.85rem;
  color: var(--igem-text);
}

@media (max-width: 900px) {
  .igem-workbench { grid-template-columns: 1fr; }
  .igem-workbench__sidebar {
    position: relative;
    max-height: none;
    border-right: none;
    border-bottom: 1px solid var(--igem-border);
  }
  .igem-workbench__main { padding: 1.5rem 1rem 3rem; }
}